Chugs gives Garrett the drugs used to "sedate" Megan, setting their idiotic plan in motion. She gave her brother fake date rape drugs to dose his girlfriend with. The fact that Garrett is not suspicious of this in the slightest means Garrett is willing to believe his sister would help him date rape one of her closest friends. What kind of person is Chugs that this behaviour doesn't seem out of the ordinary to someone who grew up with her?!